02/05/2026
A landlord came to us recently with a problem.
New tenant moved in. Everything seemed fine. Three months later, he tried to increase the rent — and found out he couldn't.
Not because he'd done the maths wrong.
Not because of RPZ rules.
Because he'd never registered the tenancy with the RTB.
And here's the part nobody tells you: you have exactly 1 month from the day a tenancy starts to register it. Miss that window, and you lose your right to enforce a rent increase. Full stop.
The RTB doesn't send you a reminder.
Your solicitor probably didn't mention it.
And it costs landlords thousands every year in lost rent — not from a fine, but from an increase they legally cannot apply.
If you have a tenant who moved in recently — check your RTB registration date today.
📋 We've written a full guide on the deadline, what counts as the "commencement date," and what to do if you've already missed it.
You have exactly 1 month from your tenancy commencement date to register with the RTB. Miss it and you can't enforce rent increases. RTB won't remind you. Here's everything you need to know.
